AAS 204th Meeting, June 2004
Session 3 Stellar-Solar Connection
SPD Poster, Monday, May 31, 2004, 9:20am-6:30pm, Ballroom

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[3.01] Chromosphric Activity and Evolution of ``Maunder Minimum" Stars

J. T. Wright, G. W. Marcy (UC Berkeley)

Many stars previously identified as ``Maunder minimum'' stars are actually slightly evolved off the main sequence. We extracted activity measurements from the California and Carnegie Planet Search program stars and Hipparcos parallaxes to demonstrate that the relation often used to derive ages of main sequence stars breaks down as a star evolves off the main sequence. We find that stars only 1 magnitude above the main sequence exhibit significantly supressed activity levels which have been mistaken for examples of ``Maunder minimum'' behavior.

The author(s) of this abstract have provided an email address for comments about the abstract: jtwright@astron.berkeley.edu

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